Sorry for the crude draw, I hope gets things clear.
Nope.
I know it is not correct but that's not the point of the drawing.
Yes it is.
Just saying nope, won't help me find what is unclear, is clear for me just hard to put it on text (or drawing). The diagram is not correct because the modules are represented by 3 LED's, but the topology is, where the voltmeter, power supply, and load is.
This is the strip I am talking about:
.
There is a RGB LED in each module, and yes there are 50 modules (LED plus ucs 5903). Right now I can't measure the resistance because it's still on the tree
, but if I have aprox 2.7V at the begining and 2.5V at the end, shouldn't the drop be around 0.2V? With the measured 0.7A current it should be around 0.3 ohms (correct me if I am wrong).
About expected current and power...almost no ideea.
The built in resistor should give 18-20 mA (from datasheet) per LED so:
20 * 50 = 1A
The measured current is 0.7A but the voltage is lower than the nominal 5V so I guess it's the correct one.